Mechanochemical Synthesis of Anhydrous Sodium Thiosulphate
D. N. DZHARLYKASIMOVA1, M. M. BURKITBAEV1, P. A. GALIEVA1, B. M. URALBEKOV1, F. KH. URAKAEV2
1Al-Faraby Kazakh National University, Pr. Al-Faraby 71, Almaty 050040 (Kazakhstan)
2Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, Pr. Akademika Koptyuga 3, Novosibirsk 630090 (Russia)
Keywords: сера, сульфит натрия, механохимический синтез, тиосульфат натрия, sulphur, sodium sulphite, mechanochemcial synthesis, sodium thiosulphate
Abstract
Mechanochemical synthesis of anhydrous sodium thiosulphate Na2S2O3 was carried out for the first time by means of mechanical activation of the stoichiometric powder mixture of sodium sulphate (Na2SO3) and sulphur (S) in the ball planetary mill “Aktivator-2SL”. By means of iodometric titration, X-ray phase analysis and thermal analysis, it was established that under relatively mild conditions of mechanical activation for about 1 h the degree of transformation in the solid-phase reaction Na2SO3 + S = Na2S2O3 reaches 95 %.
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